I also continue attending meetings and going to field service, although I do as little as I possibly can without raising any flags from friends or family. My current situation is very similar to Richard_I's.
It's funny, I had the same thoughts during the "Beware of Apostates" talk during this year's convention; "I wonder if anyone out there is thinking this is a load of BS?" There's got to be others it's just nearly impossible to know...
@Ding: Personally, the few times I go out to service, I simply hand out a magazine and walk away. I will usually introduce myself, mention I'm a JW and let them know that I have some bible-based info for him/her to read and leave. 99% of people will never ask you anything and if someone tries passing a study onto me, I'll just tell them it's difficult for me to pick it up because of my work/school schedule. Like SloppyJoe mentioned, it does make you feel like crap but I suppose you get somewhat used to it for after a while. You get used to doing the bare minimum and justify staying in for now because the alternative means losing your family and close friends.
I couldn't bear to bring another person into a group like this, but I'll still get that "you have no idea what you're getting into" feeling when I see that new study going to the meetings and "progressing in the truth."